Airport pavement concrete for plateau regions

A concrete and regional technology, which is applied in the field of airport pavement concrete in plateau areas, can solve the problems of low durability and crack resistance of concrete, and achieve the effects of improving mechanical properties, increasing compactness, and reducing cracking

Inactive Publication Date: 2021-06-18
CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of airport pavement concrete in plateau areas, to solve the existing concrete used for the ground of airport roads in plateau alpine areas, the problem of low durability and crack resistance of concrete

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  • Airport pavement concrete for plateau regions
  • Airport pavement concrete for plateau regions
  • Airport pavement concrete for plateau regions

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Embodiment 1

[0019] During the preliminary exploration of the embodiments of the present invention, it is found that:

[0020] Due to its special climatic conditions in the plateau and alpine regions, the most common disease form of concrete is freeze-thaw damage. Therefore, meeting the anti-freezing index is the basic requirement of plateau concrete engineering. The conventional economical and effective technical measures to improve the anti-freezing performance of concrete are in In the mixing stage, a certain amount of air bubbles are introduced into the concrete by adding air-entraining agent together with stirring, friction and shearing. In order to meet the needs of mechanized construction and improve construction efficiency, dry hard concrete is basically used for the airport pavement. Dry-hard concrete is difficult to mix, and it is difficult to fully rub and shear the internal materials. In order to ensure compactness during the dry-hard concrete paving process, strong vibration m...

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Abstract

The invention discloses airport pavement concrete for plateau regions, which relates to the technical field of building materials and comprises the following raw materials: cement, a mineral admixture, fine aggregate, coarse aggregate, a water reducing agent, a reactive air entraining material, a bubble inhibitor and water. The reactive material is adopted, the air entraining mode of the concrete is adjusted, and the problems that gas is generated too early and is damaged by a bubble inhibitor, the air entraining effect is poor, and the durability and the crack resistance of the concrete are reduced are solved; the whole concrete can be expanded without adopting an additional expanding agent, so that the plastic shrinkage at the early stage of hydration is inhibited, and the risk of cracking of the concrete of the runway is reduced; by doping the bubble inhibitor, large bubbles clamped between the aggregate and the mortar due to stirring are eliminated in the stirring process, the compactness of the concrete is improved, and the mechanical property of the concrete is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an airport pavement concrete in plateau areas. Background technique [0002] The airport runway is the most important part of the airport building, the normal operation of the airport runway, and the normal performance of the airport functions. Ordinary airport pavement concrete has been subjected to frequent impact loads, fatigue damage and wear for a long time; for airports in plateau alpine regions, in addition to the above unfavorable factors, pavement concrete also has to withstand the test of special climatic and environmental conditions. "Civil Airport Cement Concrete Pavement Design Specification" (MHT5004-2010) requires that the design strength of cement concrete materials shall be based on the flexural and tensile strength of 28d age not less than 4.5MPa, and the minimum monthly average temperature is less than -10℃. , the frost resistance of pavement concre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/0075C04B2201/50
Inventor 丁庆杨代六田先忠王毅
Owner CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE
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